Frequencies for first 10,000 rows of prdiag3 variable in namcs1999 dataset :

   is diag3 |
  probable, |
questionabl |
       e or |
   ruleout? |      Freq.     Percent        Cum.
------------+-----------------------------------
          0 |      1,834       18.34       18.34
          1 |         50        0.50       18.84
          2 |      8,116       81.16      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016